A Diplomatic Introduction
You have to understand, mating is much, much different in our society, largely because our biological imperatives loom much larger.
A Helping Hand
Xelam's biological imperative overwhelmed the seriousness of the situation and his emerald pole slowly emerged from its sheath. the khajiit helped him along by turning his back to the argonian and grinding up and down against his cock.
Swampert Sex Tape
She fucked for pleasure as many pokemon did, but the biological imperative was to be seeded. her womb knew not that maxwell was an incompatible partner; it knew only that it loved the feeling.
His House, His Rules: Chapter 2
They were unable to ignore their biological imperative any longer. in unison, they clenched, shuddered, and pulsed, sending streams of seed through the brown horse's urethra.
Together, Soaring - by Jeeves
It took another ten minutes of tasting and nuzzling against the dragoness from below for the male to earn his way back into his mate's good graces, and then only because biological imperatives were driving her wild at the very idea of _not_ finding someone
Ferry Tail
biological imperatives wanted to take over, and he wanted to let them. mira was extremely clear about her own wants. "ohhh... that's it, gorgeous, don't hold back... fffucking hell, that's good..." she let out a low, throaty groan.
A Matter of Honor
His body demanded he fulfill his biological imperative. after all, a willing female was dangling her cunt above his shaft. she waited not for his approval, nor needed it.
Absinthe Magazine Vol. 6 Interview
Sex strictly for pleasure and an expression of love, mating is a biological imperative. mating just sort of _happens_ whether it's an appropriate time or not and the resultant pup may not know who his father is.
Commission: Pop Goes the Dragoness
The regular residents of the forest had mostly avoided this place, but every so often the odd interloping humanoid would drop by, letting it perform its biological imperative.
Pathogen
The animal instincts taking root in his brain finally snapped, syncing up, giving him the biological imperative to breed... even though it wouldn't work from that end. his last memory as his mind changed as rapidly as his body was of rex.
The Ryan Story Part X
It works out well for dragonkind as it satisfies our biological imperative to snoop." beth laughed. "we've always said that ryan was far more curious than any cat!" "cats have nothing on dragons for curiosity," tanner said wryly.
A Driving Urge - by Jeeves
Beyond a biological imperative to protect and claim. beyond the carnal desire for companionship and a virile breeding partner. beyond even the loyalty of repeated mateship and the raising of litters as parents.